This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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n. An organ in animals that produces gametes, especially a testis or ovary.

n. A sex organ that produces gametes; specifically, a testicle or ovary.

n. The testicles.

n. One of the masses of generative tissue primitively alike in both sexes, but giving rise to either an ovary or a testis; a generative gland; a germ gland.

n. In biology, a germ-gland; a germinal or reproductive gland or organ, in the widest sense, producing sperm-cells or egg-cells; an ovary or a spermary, of whatever kind, in a primitive or an indifferent state.

n. a gland in which gametes (sex cells) are produced

"The recent election results have shown that the Democrats, while they still haven’t grown themselves a pair, do at least seem to have gained ONE gonad, which is better than the NONE they had before."

endocrine gland    endocrine    ductless gland   

Wikipedia article on sex organs   

bollock    ball    testicle    ovary    Orchis    ovotestis    nut    testis    egg    ballock   

gonadic    gonadal    gonadectomy    gonadoblastoma   

monad   

Androgyne    epididymis    infibulation    bisexuality    pederasty    onanism    masochism